from math import hypot
class Vector:
    def __init__(self,x=0,y=0):
        self.x=x
        self.y=y
    def __repr__(self):
        return 'Vector(%r,%r)' %(self.x,self.y)
    def __abs__(self):
        return hypot(self.x,self.y)
    # def __bool__(self):
    #     return bool(abs(self))
    def __add__(self, other):
        x=self.x+other.x
        y=self.y+other.y
        return Vector(x,y)
    def __mul__(self, scalar):
        return Vector(self.x*scalar,self.y*scalar)


a1=Vector(1,2)
a2=Vector(2,3)
print(a1+a2)
print(repr(a1))
